Rotary explosion engine



Jan. `12` 1926.

2 Sheets-Shut 1 MyGQ RosENTHAl.

RoTARY EXPLOSION ENGINE Filed August 29. 1923 Jan. 12 1926.

M. G. ROSENTHAL ROTARY EXPLOSION ENGINE 2 Sheets-Shep?. 2

Filed August 29, 1925 Inl/awr.' Max @Hose/dw, g5] xfa Jf/Z'Zz with a series of outwardly shifting piston y Patented Jan. l2, 1926.

UNITED STATES PATENT oFFicE. f

MAX G. ROSElfITI-IAL, 0F CHICAGO, ILLINOIS.

ROTARY ExPLosIoN ENGINE.

Application led August 29, v1923. Serial No. 659,924.

blades moving in a gas tight manner in said work chamber to attain the operation of the ordinary four cycle type engine. And the present improvement has for its variousV objects: To provide a formation and combination of engine parts and mechanism, whereby a four cycle action of the engine, comprising an introduction by suction of an uncompressed charge of gaseous fuel, a compression of said fuel and its storage in a storage passage, a feeding of measured charge of the compressed fuel to attain an 'explosive or power stroke of the engine, and a final dis'- charge of the exploded fuel and scavengingA of the work chamber ofthe engine, is attained in an effective, simple and durable manner.

To provide a structural formation an combination of the rotor head, the shifting piston blades carried by said head and the cani block which controls the outward movenient of said piston blades in the work chamber of the engine, `adapted to afford an effective operation` of the engine with a minimum extent of initial outward move-l ment of the piston blades and with a moderate further outward movement of the pis! ton blades in a travel to the mid-length of the work chamber with a corresponding y progressive increase in effective piston. area.

To provide an angular or oblique arrangement of the piston blades in the circular wall of their carrying head, whereby` a gradual outward movement of the piston blades into the segmental work chamber of the engine is effectively attained and lia-bility to binding on theoperating cam surfaces avoided.

To provide a structural formation of the carrying head of the piston blades of the rotor adapted to afford convenient lubrication of the engine parts, and a compact and efficient association of said piston blades and their operating cam block, all as will here. inafter more fully appear.

In the accompanying'drawin s:

illustrating the Valve operating mechanism.

Fig. 2, is a top view of the engine parts, with the stator casing in Section on line 2.-2. Fig. 1.

3 and 3, are companion longitudinal sections illustrating the two main positions of the engine parts in the cycle of operation of the same.

Fig.- 4', is a transverse section of the same, '3'0y on line 4.-4.4 Fig. 3.v

Fig. 5, is a detail erspectve view of a pair of the piston bla es in a separated condition. v i

Like reference numerals parts in the several views. A

In the preferred form of the invention shown in the drawings, the stationary member oi stator is formed by a main shell orv section 1 having a removable end head or 80 section V2, with said section formed with 'bearings for the power shaft 3 of the engine'. C oncentric with the power shaft 3, the sections 1 and 2 are formed with circular end bearing recesses 4, in which the ends of the hereinafter described carryingl head of the piston blades are supported in a revoluble manner, leakage along the joints between the parts being prevented by the arrangementJ f packing rings 5 in one orthe other 00 of the parts.

Between the end bearing recesses 4 above described, the main section l of the stator is formed 'with an enlarged cavity for the reception for the middle portions of the carrying head and the pist-on blades of the rotary member or rotor of the engine. Said cavity has an irregular form, which in the preferredy construction shown in Fig. 3 consists of an upper outwardly enlarged seg. 100

mental portion constituting the work chamber 6 of the engine, with its outer curved wall on a curve, the radius of which is eccentriccto the axis o f the power shaft 3 for the purpose hereinafter set forth. Said cavity has a lower curved portion 5 concentric with the axis of the power shaft 3, and having adjacent relation to the carrying head of the piston blades heretofore referred to, with the respective ends of the portions J3 Fig. 1, is a side elevation o the engine,

indicate like 75 just'described connected together by inclined portions orsurfaces 5" in which are formed the respective inlet and outlet ports or passages7 and 8- of the Work chamber 6, and

having communication with the valve chamber 9 and 10 formed in the casing section 1 aforesaid. I e

Adjacent toits peripheral portlon, the

- main .easing section 1, is cored out to provide a Water cooling jacket or chamber 11 in adjacent relation to the work and valve chambers above described. And a material block 13 forms a fixe part of the main stat-V or section 1, With its cam surface or perimeter having a complementary formation to that of the segmental outer Wall of the Work chamber 6, and inclined faces 5 of the main cavity of said section, with a vieyv to maintain the hereinafter described plston blades in contact with said surfaces in the operation of the engine. Therotary member or rotor of the engine consists of a cylindrical shell 14 mounted by an end hub portion 15 on the power shaft 3, with the opposite end of the shell open for the purpose hereinafter set forth, and in the construction shown the end portions of the shell 14 fit and turn in the end recesses 4 of the main stator section 1 and end leakage at the joints prevented by lthe packing rings 5 as heretofore described. The middle portion of shell or head 14 is formed with a series of obliquely arranged longitudinal guide slots 15 of a Width equal to the Width of the work chamber 6 of the stator and adaptedvto receive and guide the'piston bla-des, no W to s be described.

The piston blades 16, 16` and 17, 17 are of the flat plate type connected together in pairs by transverse connecting yokes 18, so that each pair will have a spaced relation in parallel planes and corresponding with the oblique arrangement of the slots"15 in the shell or head 14 of the rotor and in which they fit and slide. In the construction shown each connecting yoke 18 is formed with an elongated slot 18 which encircles the power shaft 3 so as to have free movement with relation thereto, and the inner ends of the respective piston blades 16, 16 and 17, 17 are provided with bearing rollers 19 adapted for rolling contact with the peripheral cam surface of the cam block 13 aforesaid.

The eccentric formation of the Work chamber 6 above described is adapted to provide a segmental form of Work chamber of a gradually increasingl area from both its inlet and its outlet ends to the middle or crovvn portion of the chamber, witn a corresponding serial increase and decrease in the exposed area of the piston blades as one position of the valve to register the in- .let part 7 of the Work chamber 6 with a plpe or passage 21 extending to a carburetor or like source of uncompressed fuel supply. In adjacent relation to said duct or passage 21, the valve 20 is'formed with a 85 measuring chamber 22 adapted for alternate registry With the storage passage 12 and the inlet part 7 of the Work chamber 6, to carry a supply of compressed fuel from one to the other.

In the construct-ion shown, the inlet port or passage 7 of the Work chamber 6 is provided With a spark plug 23, adapted to fire the charge of compressed fuel in the port 7 and chamber 22 at the operation of the engine.

A companion valve member 24, also of the rocking type, is arranged invalve chamber 10, aforesaid, and is formed with a curved duet or passage 25 adapted in one position 100 of the valve to register the outlet port 8 of the Work chamber 6 with the exhaust-passage or pipe 26 of the engine. In adjacent relation to sai-d duct or passage 25, the valve 24 is formed With an angular duct or passage 27 adapted to register said outlet port 8 with the compressed fuel passage 12 aforesaid.

The valves 20 and 24 are operated in'unii son with each other by an operating cam 28 carried by the power shaft 3 and having 110 operative connection by any usual means with the stems or shafts 20 and 24 of the( valves. In the construction shown in Figs.

1 and 2, a bar 29 is slidingly mounted at one side of the closure head 2 of the stator cas-'.115

ing and receives positive motion in one direction from the cam 28, through a roller 30 mounted on the bar, and in the other direction by a spring 81. Near its respective ends the bar 29 is formed with gear teeth 32 hav- 120 ing engagement with gear Wheels 33 on the stems of the' valves 20 and 24 to impart the required intermittent rocking movements to said valves.

A pipe passage 34 in a side Wall of the 125 proper periods the 95 shown in Fig. 3, with the inlet port member 20, and with .the outlet port 8 of' the -work chamber in communication with the fuel storage passage 12 through the angular passage 27 of the valve member 24.

" With a rotation of the engine rotor, the piston blade 16 inv its movement in the work chamber 6 acts to draw in'a supply of n ncompressed fuel into such chamber, while the piston blade 17 acts to compress and move a .charge of fuel into the storage passage 12'.

As said piston 17 nears the port 8 vaforesaid, the valves 20 and 24 are reversed to the position illustrated in Fig. 3, bringing the curved passage 25 of the valve 24 into register with the outlet port 8 of the work chamber and with the exhaust passage or pipe 26 of the engine. At the same time the compressed fuel supply chamber 22 of the valves 20 is in registerwith the inlet port 7 v o f the work chamber. Vith the piston blade 17 moved past or nearly past the inlet port 7,

the charge of -compressed fuel in said port and in the chamber 22 is fired by the spark plug 23, to attain a power stroke of the engine, during which the preceding piston blade 16 acts to force the previously exploded fuel charge out of said workchamber 6 and into the exhaust passage or pipe 26.

With or near the end of the power stroke of the aforesaid piston blade 17, the valves 20 and '24 are again reversed to bring their ports and passages back to the position first described in the present operation, for a fresh cycle of the operations above set forth.V

With the construction shown in the drawings, in which four piston blades 16, 16 17 and 17 are used, the usual four cycles of Voperation of the engine will take place in a one half revolution of the rotor, and it is within thescope of the present invention to either reduce or increase the number of said piston blades as circumstances may require.V

formed with a lurality of oblique guide slots-extending ongitudinally of the rotor head, piston blades moving in said slots and rigidly connected together in offset relation a transverse memberformed with an b elsbngated slo-t to span the power shaft, a

stator casing having a cavity formed with end bearing recesses forthe ends of vsaid f revoluble h ead, with a se mental work chamber to receive the piston lades, and with inclined walls at the respective ends of said workchamber containing the inlet and outlet v ports of said chamber, a cam block carried by the statorand having operative engagement with the inner ends of the piston blades, a

lpassage for compressed fuel formed intermediate of the'inlet vand outlet ports of the l work chamber, and valves operatively connected with the rotor for controlling the inlet and outlet ports of thework chamber.

'2. In a rotary motor of the type described, a .rotor comprising a hollow cylindrical head open at one'end and having at its other end a carrying hub for attachment to a power shaft, the circular wall of the Said head being formed with a pluralityfof oblique guide slots extending longitudinally of the rotor head, piston blades moving in Saidl slots and rigldly connected together in offset relation by a transverse member formed with an elongated slot to span the power shaft, a stator casing having a cavity formed with end bearing recesses for the ends of said cylindrical head, with a` segmental work chamber to receive the piston blades, and with inclined walls at the respective ends of the work chamber containy scribed, a rotor comprising a hollow revoluble head formed with a plurality of oblique guide slots extending longitudinally of the rotor head, piston blades moving in said slots and rigldlyconnected together in oft'- set and in crossed relation by transverse members formed with elongated slots to span the power shaft, a stator casing having a cavity formed with end bearing recesses vfor the ends of said revoluble head, with a segmental work chamber to receive the piston blades, and with inclined walls at the respective ends of the work chamber containing the inlet and outlet ports of said chamber, a cam block carried by the stator and having operative engagement with the inner ends Aof the piston blades, a passage for compressed fuel formed intermediate of the ber.

inlet and outlet ports of the work chamber, and valves operatively connected with the rotor for controlling the inlet and outlet ports of the work chamber. y

y4f. In a rotary motor of the type described, a rotor comprising a hollow cylindrical head open at one end and having at its other end a carrying hub for attachment to a power shaft, the circular wall of said head being formed with a plurality of oblique guide slots extending longitudlnally of the rotor head, piston blades moving in said slots and rigidly connected together in offset and crossed relation by transverse members formed with elongated slots toy span the power shaft, a stator casing hav` ing a cavity formed with end bearing recesses for the ends of said cylindrical head, with a segmental work chamber to receive the piston blades, and with inclined walls at the respective ends of 4the workchamber containing `the inlet and outlet ports of said chamber, a cam block carried by the stator and having operative engagement vlwith the inner ends of thepiston,blades, a passage for compressed fuelformed intermediate of the inlet and outlet ports of the work chamber, and valves operatively connected with the rotor controlling the inlet and outlet ports of the work cham- 5. In a rotary motor of` the type described a rotor comprising a hollow revoluble heah formed with a plurality of oblique guide slots extending longitudinally of the.

rotor head, piston blades moving in said slots and rigidly connected together in odset relation by a transverse member formed with an elongated slot to span to the power shaft, a stator casing having a cavity formed with end bearing recesses for the ends of said revoluble head, with a segmen` tal Work chamber to receive the piston blades, and with inclined walls at the respective ends of said work chamber contain- Y ing the inlet and outlet ports of said chamber the outer wall of the work chamber being on a curve eccentric to the axis of the rotor, a-cam block carried by the stator and having operative engagement with the inner ends of the piston blades, a passage for compressed fuel formed intermediate of the inlet and .outlet ports of the work chamber, and valves operatively connected with lthe rotor controlling the inlet and outlet ports of the work chamber.

6. In a rotary motor of the type described, a rotor comprlsing a hollow revoluble head formed with a plurality of oblique guide slots extending longitudinally of the rotor head, piston blades moving in said slots and rigidly connected together in offset relation by a transverse member formed with an elongated slot to span the power shaft, a stator casing having a cavity formed with a rotor comprisin end bearing recesses for the ends of said engagement with the inner ends of the pis- A l ton blades, individual valves associated with said inlet and outlet ports and having operati've connection with the rotor, and a passage for compressed fuel formed intermework chamber.

7 `In a rotary motor of the type described, a hollow revoluble head formed with a p uralit of oblique guide slots, extending longitudinally of the rotor ldiate of the inlet and outlet ports of the head, piston blades moving in said slots and rigidly connected together in offset relationJ by a transveise member formed with an elongated slot to span the power shaft, a stator casing having a cavity :formed with end bearing recessesfor the ends of said revoluble head, with a segmental work chamber to receive the piston blades, and withinclined walls at the respective ends of -said work -chamber containing the inlet and outlet portsv of said chamber, a cam block carried by the stator and having operative engagement with the inner Aends of the piston blades, individual valves associated with said inlet and -outlet erative connections with the rotor, and a passage for compressed fuel formed in the stator casing intermediate of said valves.

8. In a rotary motor of the type described, a rotor comprising a hollow revoluble head formed with a pluralit of oblique guide slots extending longitu inally of the rotor head, piston blades moving in said slots and rigidly connected together in offset relation by a transverse member formed with an elongated slot to span the power shaft, a stator casing having a cavity formed with end bearing recesses for the ends of said cylindrical head, with a segmental work chamber to receive the with inclined walls at t e respective ends of said work chamber containing the inlet and outlet,l orts of said chamber, a cam block carrie by the stator and having operative engagement with the inner ends of the piston blades, individual valves associated with said inlet and outlet ports and having operative connections with the rotor, and a passage for compressed fuel formed intermediate of the inlet and outlet ports of the work chamber, one of said valves having a port adapted to register the work chamber with a source of uncompressed fuel supply and with a measuring cavity adapted to alternately re ister with the storage chamber and inlet 0% the work chamber, the other valve having a port adapted to register the piston blades, andv ports andhaving opoutlet port of ,the work chamber with the exhaust passage of the engine, and an angular port adapted to registerl said outlet port gf the work chamber with the storage cham- 9. In a rotary motor of the type described, a rotor comprisin a hollow revoluble head formed with .a puralit of oblique guide slots extending longitu inally of the revoluble head, iston blades moving in said slots and 'fixedlv connected together at their inner ends in offset relation by an intermediate member, a stator casing having a segmental work chamber to receive the piston blades and providedwith inclined walls at the respective ends of said work chamber containing the inlet and outlet ports of said chamber, and a cam block -carried by the stator and having operative engagement with the inner ends of the piston blades.

10. In a rotary motor of the type described, la rotor comprising -a hollow revoluble head formed with a plurality of oblique guide slots extending longitudinally of the revoluble head, piston blades moving 1n said slots and ixedly connected together at their inner ends in pairs having a crossed relation by an intermediate member, a stator casing having a se ental` work chamber to receive the piston lades'and provided with inclined walls at the respective ends of said .work chamber containing the inlet and outlet ports of said chamber, and a cam block carried by the Astator and havin operative engagement with the inner ends o the pistonv blades. v

11. In a rotary motor of the type described, a rotor com risin a hollow' revo-luble head formed with a p urality of oblique guide slots extending lon itudinally'of the revoluble head piston bla es moving in saidslots and ixedlg connected together at their inner ends in o ate member, a stator casing having a segmental work chamber to receive the piston blades and provided with inclined walls at the res ctive ends of said work chamber contaimng the inlet and outlet ports of said chamber, and aI camblock carried by the stator and having operative enga ement with the inner ends of the'piston bla es, the outer wall surface of said work chamber being formed on a curve eccentric to the axisof the rotor.

1.2. In a rotary motor of the type deset relation by an intermedia crossed relation by intermediate members,

a stator casing having a segmental work chamber to receive the piston blades and provided with inclined walls at the respective ends of said work chamber containing the inlet and outlet ports of said chamber, and a cam block carriedv by the stator and having operative engagement with the inner ends of the piston blades, the outer wall surface of said work chamber being formed on a curve eccentric to the axis of the rotor.

13. In a rotary motor of the type described, a rotor comprising a hollow revoluble head formed with a plurality of oblique guide slots extending longitudinally of the revoluble head, piston blades moving in Said slots and fixedly connected together at their inner ends in oiset relation by an intermediate member, a stator casing having va cavity formed with end bearing recesses for the ends-of said head,with'a segmental -work chamber to receive the piston blades l and with inclined walls at the respective ends of said workchamber containing the inlet and outlet ports of said chamber, and a cam block carried by the stator and having operative engagementl with the innerv ends of the piston blades.

14. In a rotary motor -of the type described, a rotor comprising a hollow revoluble he'ad'formed with a plurality of oblique" guide slots extendinglongitudinally of the revoluble head, piston blades moving in said slots and -iixedly connected together at their inner ends in pairs having a crossed relaf tion by intermediate members, a statorcasing having a cavity formed with end bear- "ing recesses for the ends of the revoluble head, with a segmental work chamber to receive said piston blades and with inclined walls at the respective ends of said work chamber containing the inlet and outlet ports of said chamber, and a cam block carried by .the stator and having o erative engagement with the inner end'of t e piston blades.

Signed at Chicago, Illinois, this 27th day of August, 1923. v l

" MAX G. aosENTHAL. 

